df(1) showing different statistics for different users

[Michael Neumann]

On Mon, Aug 20, 2018 at 10:42:38AM -0700, Matthew Dillon wrote:
> Yes.  Root gets more headroom than non-root users, because system demons
> tend to implode if they run out of disk space and we don't want regular
> users to mess up root that way.

Makes sense. Thanks!

Regards,

  Michael

> 
> -Matt
> 
> On Mon, Aug 20, 2018 at 10:15 AM, Michael Neumann <mneumann at ntecs.de> wrote:
> 
> > Hi,
> >
> > When I run "df" as root it shows a capacity of 93%, while as
> > unpriviledged user, it shows 98%:
> >
> >         # df -k /dev/serno/S3EWNCAHC00357M-1.s1e at DATA
> >         Filesystem                            1K-blocks     Used   Avail
> > Capacity  Mounted on
> >     /dev/serno/S3EWNCAHC00357M-1.s1e at DATA  20357120 19002752 1354368
> > 93%    /build
> >
> >     > df -k /dev/serno/S3EWNCAHC00357M-1.s1e at DATA
> >     Filesystem                            1K-blocks     Used  Avail
> > Capacity  Mounted on
> >     /dev/serno/S3EWNCAHC00357M-1.s1e at DATA  19339264 19002752 336512
> > 98%    /build
> >
> > I did run "hammer2 cleanup" before, as I got a lot of these errors on
> > the console:
> >
> >         hammer2_alloc_indirect: error 00000020 No Space on Device
> >         xop_strategy_write: error 32 loff=0000000000610000
> >
> > Before running hammer2 cleanup, I checked disk usage with "df",
> > and it showed me 97% capacity, so I was very confused why these
> > messages occured.
> >
> > Is it a feature to show less free capacity when logged in as
> > unpriviledged user?
> >
> > Regards,
> >
> >   Michael
> >

-- 
NTECS Consulting
Michael Neumann
www.ntecs.de